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Liquid Level Optical Sensor, Plastic, Phototransistor Output, 50mA, 4.75V to 5.25V Supply


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Manufacturer Part No:
Newark Part No.:
Product Range
OPB350 Series
Technical Datasheet:
OPB350W187Z   Datasheet
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Product Range Selector (OPB350 Series)

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Product Overview

The OPB350 series Liquid Sensor designed to work with 1/16, 1/8, 3/16 and 1/4-inch outside diameter clear tubes. When output reference circuitry is added, multiple output states such as fluid present, no fluid present and no tube present can be recognized. Clear liquid present causes the phototransistor to sink the maximum current, while dark liquid present causes it to sink the minimum current. As bubbles pass through the tube, the signal will vary between the liquid present and no liquid states. If no tube is present, the phototransistor sinks current between the dark fluid and clear fluid states. The ratio between the different states allows acknowledgement of different conditions. The device has leads that are designed to mount directly to PC-Boards. The device with 26AWG wires are remote mountable. The device provides a full solution with automatic calibration capability and a preset trip level.
  • Can identify if liquid is present in clear tubes
  • Opaque plastic housing enhances ambient light rejection
  • Printed circuit board mounting or 24" 26AWG wires


Sensing & Instrumentation, Industrial

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OPB350 Series

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Technical Documents (1)

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